Writing instrument



FIG. 1 is a isometric view showing a design;

FIG. 2 is a front view of the design;

FIG. 3 is a rear view of the design;

FIG. 4 is a left side view of the design;

FIG. 5 is a right side view of the design;

FIG. 6 is a top view of the design;

FIG. 7 is a bottom view of the design; and,

FIG. 8 is an exploded view of the design.

The broken lines in FIG. 8 are included for the purpose of showing portions of the writing instrument that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 